Sewing-machine.



J. GREENWOOD. SEWING MACHINE.

APPLICATION FILED APR.9, 1914.

1 1 1 5,926. Patented Nov. 3, 1914.

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J. GREENWOOD.

SEWING MACHINE.

APPLICATION FILED APILQ, 1914.

1,1 1 5,926. Patented Nov. 3, 1914.

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, UNITED STATLQQAIENT OFFICE.

JOSEPH GREENWOOD, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR OF ONE-HALFEOPERRY E. MILLER, OF PITTSFIELD, MASSACHUSETTS.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application filed April 9, 1914. Serial N 0. 830,791.

To all whom it may concern Be it known that I, J OSEPH GREENWOOD, asubject of Great Britain, residing at Pittsfield, county of Berkshire,and State of Massachusetts, have invented certain new and usefulImprovements in Sewing-Machines, of which the following is aspecification.

The invention relates to such improvements and consists of the novelconstruction and combination of parts hereinafter described andsubsequently claimed.

Reference may be had to the accompanying drawings, and the referencecharacters marked thereon, which form a part of this specification.Similar characters refer to similar parts in the several figurestherein.

Figure l of the drawings is a top plan view of an over-edgesewing-machine, partly broken away, showing the presser-foot-bar inhorizontal section. Fig. 2 is an end elevation of the same. Fig. 3 is afront elevation of the same. Fig. 1 is a view similar to Fig. 1,illustrating the movement of the A work-plate and the stitch-distendingfinger.

Fig. 5 is a plan view of an edge portion of a piece of knitted fabricornamented by over-edge stitching as applied by means of my invention. v

This invention relates to a type of sewingmachine, commonly known in theart as the Merrow machine, adapted for forming an ornamental scallopededge on knitted fabrice by means of a succession of groups of over-edgestitches crocheted together along their outer edges from group to group,the stitches in each group extending fanwise from points within the bodyof the fabric to points more or less outside of theedge of the fabric toproduce the desired scalloped effect.

The principal object of the present invention is to accentuatethescalloped eifect produced by a machine of said type.

Referring to the drawings wherein the in vention is shown in preferredform, 1, represents the bed-plate of the machine; 2, the needle; 3, thelooperor supplemental threadcarrier; and #1, the crochet-hook orlatchneedle for crocheting the over-edge stitches together.

The work is fed along the bed-plate, 1, or a work-plate, 5, bytoothedfeed-bars, 6, which play through slots, 7, in the workplate. Thefeed-bars, 6, are carried by a slide, 8, adapted to reciprocatelongitudinally in a slideway formed in a lever, 9, pivoted at 10, uponthe base, 11, of the machine, said slide, 8, having a pin, 12,projecting out through a slot, 13, in the slideway-lever, 9, which pin,12, is engaged by the forked end, 14:, of a lever, 15, fulcrumed at 16,upon the base of the machine. A pitman, 17, connects the intermediateportion of the lever, 15, with an eccentric, 18, fixed upon the maindrive-shaft, 19, upon which shaft is also fixed a pinion, 20, whichengages a gearwheel, 21,- on the shaft, 22; The pinion, 20, is muchsmaller than the gear-wheel, 21, and

causes the slide, 8, and feed-bars, 6, to be ,6, are effectiveto feedthe work only when they are projected above the level of the work-plate,5; and in the operation of the machine the feed-bars, 6, are helddepressed belowthe level of the work-plate, 5, during the formation ofeach'group of stitches intended to form a scallop on the edge of thefabric,and is then projected fora brief interval above the level ofthework-plate to quickly cause a feed-movement of the work of approximatelythe length of a scallop. The feed-bars, 6, are thus raised at intervalsby means of'a lever, 23, pivoted at 24, upon the base of the machine,said lever having a projecting finger or pin, 25, which'engages a plate,26, adjustablyfixed upon the slideway-lever, 9, said lever, 23, having alaterally projecting finger or pin, 27,1ocated in thepath of a cam, 28,fixed upon the shaft, 22. Except when the cam, 28, is in engagement withthe pin, 27 the slideway-lever, 9, rests in the position in which it isshown in Fig. 2, in which position the feed-bars, 6, are depressed belowthe level of the workplate, 5; but at each engagement of the cam, 28,with the pin, 27, the lever, 23, slidewaylever, 9, and feed-bars, 6, areelevated, thereby forcing the teeth of the bars, 6, up above the levelof the work-plate, 5, into engage ment with the work to feed the same.

The construction and manner of operation of the parts thus far describedare old and well understood in the art; and further description of thesame will be unnecessary, it being understood that the needle, looperand crochet-hook operate continuously to form' and crochet together theover-edge stitches while the work is, at the completion of each group ofstitches, fed past the needle a distance equal to the length of ascallop.

In carrying out my invention, I provide for a reciprocating movement ofthe tapered stitch-distending finger, 29, in a direction parallel withthe direction of the feed-movement of the work; and for a reciprocatingmotement ofthe work-plate, 5, in a direc-' tion at right angles to thedirection of the feed-movement of the work.

In the preferred form of my invention shown in the'drawings, thework-plate, 5, ismounted in a slideway, 230, in the bedplate', andfhas,depending from its under side, a cani-followerl'il, which engagescam-gjrooi'e, 32, in a cam, upon the shaft," 22.

The cam-groove, 32, is so formed that at the: beginning and end of' eachscallop formed'by" the machine, the work-plate, 5, will occupy itsinnermost position, as shown in lfig. 1, from which position it isgradually moved outward until one-half of the scallop is formed and thenis gradually moved inward as the other half of the scallop is formed.This reciprocating movement of the work-plate is sufficient to'cause aslight reciprocating movement of the work sidewise relatively to'thep'resser-foot, 34, and needle, 2, which causesthe needle to pass throughtheworlr slightly nearer the edge of the work during the formation ofthe stitches at the middle of the scallop than during the formation ofthe stitches at the ends of the scallop, thus permitting the stitches atthe middle of the scallop to extend to afgreate'r distance outside theedge of thdfabridthan they would if the work wasnot so shifted.

"Thetapere'd stitch-distending finger, 29, over which the stitches areformed is carried by a slide-bar, which reciprocate's in a slide'wa'y,3.6, 'formed in the bed-plate, 1, parallel with the direction offeed-movement o'fithe'worln i As a'means for reciprocating the slidebar,35, I provide the same with an oblique sli'dew'ay-groovef37, adapted toreceive an obli'qi' el eitending finger, 38, mounted uponfa'nd carriedby thework-plate, 5, whereby, aistlie wo1-kpla'te,5, ismo'ved outwardly,the slide-bar 35, and tapered finger, 29, will be'moved inwardly'tobring a wider part of the tapered finger, 29, opposite the needle; andas the work-plate, 5, is moved inwardly the slide bar, 85, will be movedoutwardly to"brin g the narrower part of the tapered finger, 29.,opposite the needle. The tapered fiiigeli, 29, thus acts to distend thestitches formed over it, to a greater degree at the middle of. eachscallop than at the ends thereof, and in so doing, it cooperates withmovableworlnplate, 5, to distend to the qreatest degree the stitches,which, due to the inovement of the work-plate, 5, are inserted nearestto the edge of the fabric, with the result that the stitches at themiddle of each scallop are made longer than the stitches at the ends ofthe scallop. The scallops are thus accentuated, made more prominent, andare better defined than when the stitches are all of the same length andall pass through the fabric at the same distance from its edge, in whichcase the scalloped effect is due entirely to the fan-wise arrangement ofthe stitches.

The oblique finger, 38, preferably has a slotted-shank, 39, whim isattached to the work-plate, 5., by means of a set-screw, 40, whereby theposition of the finger relatively to the slide-bar, 35, can beadjustably varied to properly time the movement Of the taperedfinger,29, to accord with the movement of the work-plate,

It will be under'stoo'd that the movable tapered, stitch-distendingfinger, 29, and the movable worl r-plate, 5, eachof itself tends toaccentuate the scalloped formation. By their combined use, however, Iam' able to obtain greater accentuation (if the scalloped formation thanwith either the movable finger or the movable plate used alone.

Forcertain purposes of the invention, the stitch-distending taperedfinger may be reciprocated many known manner and the work-plate, or,device which engages the work and shifts the work sidew'is'e of; theneedle,'may be operated in any known manner.

I have shown in the drawings a looper, 3. which'in certain machines ofthis general type carries a second thread, and is l rnown as a siipplemental thread-carrier; butI do not wish to b'e'limited to the use ofsuch a looper or supplemental thread car'rier, as.

for certain purposes of my invention any known' mechanism for formingover-edge stitches 'crochetin them'together may be employed in combnation with my improved means for accentuating the scallops formed, bythe machine.

What lclaim, as new and desire to secure by Letters Patent is i 1 in amachine of the class described, and

in combination, over-edge-stitch-forming 'inecl1anisn1,'including aneedle and a crochet-hook; means for intermittently feeding theworkup'on the completion of'each group of stitches; a work-engagingmember movable transversely of the direction of feedniovement ofthework; and means for automaticallyimparting to said member areciprocating movement in the" interval between 'successivefeed-movements of the work.

2. In a machine of the class described, and in combination,over-edge-stitch-forming mechanism, including a needle "and acrocheteliook, means 'for intermittently feeding the work upon thecompletion of each ,zgroupof stitches; a pair of work-engaging memberscomprising a work-plate' and a resserfoot, one of said members belngmovable relatively to the needle transversely of the direction of thefeedmovement; and means for automatically imparting to said movablemember a reciprocating movement relatively to the needle in-the intervalbetween successive:feed-movements of" the work; a taperedstitch-distending finger over Which the stitches are formed; and meansfor automatically imparting to said finger a reciprocating movement inthe interval between successive feed-movements ot the work.

4:. In a machine of the class described, and

over-edge-stitch-forming mechanism, including a needle and a. croincombination,

chet-hook; means for intermittently feeding thework upon the completionof each group of stitches; a Work-supporting plate capable ofmovement atright angles to the direction of feed-movement of the work and providedwith openings to receive the said work-feed 111g means; and means forautomatically imparting to said. plate a reciprocating move- 5. In amachine of the class described, and

in combination, over-edge-stitch-forming mechanism, including a needleand a crochet-hook; means for intermittently feeding the Work uponthecompletion of each group of stitches; a Work-supporting plate capable ofmovementat right angles to the direction of feed-movement of the Workand provided With openingsto receive the said work-feed 11181113 in-theinterval between successive feed-c v movements of the Work.

ing means means for automatically imparting to said plate areciprocating movement in the intervalbetvveen successive feedmovementsof the Work; a movable, tapered stitch-distending finger over which thestitches are formed; and a member carried by said- Work-plate engageablewith said taperedstitch-distending finger to reciprocate the linger inaccordance with the reciprocating movement ofthe Work-plate.

In testimony whereof, I have hereunto set my hand this 3rd day of April,1914.

' JOSEPH GREENWOOD.

Witnesses: j I q n V J OSEPH A." PFEIFFER,

FRANCIS M. CALLANAN,

copies of this patent may be obtained for five mama, by addressin g theCommissioner of Patents,

' Washington,0. I I Y a

